3b+21+2b-9=97

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Solution for 3b+21+2b-9=97 equation:


Simplifying
3b + 21 + 2b + -9 = 97

Reorder the terms:
21 + -9 + 3b + 2b = 97

Combine like terms: 21 + -9 = 12
12 + 3b + 2b = 97

Combine like terms: 3b + 2b = 5b
12 + 5b = 97

Solving
12 + 5b = 97

Solving for variable 'b'.

Move all terms containing b to the left, all other terms to the right.

Add '-12' to each side of the equation.
12 + -12 + 5b = 97 + -12

Combine like terms: 12 + -12 = 0
0 + 5b = 97 + -12
5b = 97 + -12

Combine like terms: 97 + -12 = 85
5b = 85

Divide each side by '5'.
b = 17

Simplifying
b = 17

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